Alum salt (potassium aluminum sulfate) might just become your go-to survival spice. Long used for crisp pickles and canker sores, it also purifies water fast. When mixed in, it clumps together impurities like dirt, bacteria, and organic matter—making them easy to filter or let settle. It’s a centuries-old trick still used today in lakes and off-grid setups. In a crisis or daily prep, adding alum to your kit means cleaner, safer water with a simple, shelf-stable tool.
Why You Should Add Alum Salt to Your Water – Ask a Prepper How To
